Thesis (Ph. D.)--University of Missouri-Columbia, 2000. / Typescript. Vita. Includes bibliographical references (leaves [88]-91). Also available on the Internet.

This study was designed to investigate if the Batería Woodcock-Muñoz: Pruebas de Habilidad Cognitiva- Revisada is a valid cross-cultural tool to measure the cognitive ability students of three Spanish-speaking groups from two different Spanish-speaking countries. One group is represented by culturally diverse bilingual Spanish dominant students in Tucson, Arizona since there is an overrepresentation of bilingual students receiving special education services in all school districts in this area. The second group consists of monolingual Spanish-speakers from Costa Rica referred for special education. The third group constitutes monolingual Spanish speakers from Costa Rica performing at grade level.This research analyzed whether or not Memory for Sentences, a sub-test of Short Term Memory, Visual Integration and Picture Recognition sub-tests of Visual Processing in the Psycho-educational Batería Woodcock-Muñoz, is more difficult for the special education Spanish/bilingual population in Tucson than for the monolingual Spanish-speaking special education and grade level individuals in Costa Rica. Item p-value differences in each subtest were estimated and compared for all items for each subtest to detect if a major item difficulty order difference existed between Spanish-speaking groups that could be indicative of internal criteria of test bias. Results show that the item order of difficulty affects the tests' established cut off rules for both Costa Rican populations in the Memory for Sentences test, making it invalid for these populations; and that the Tucson sample group's performance is lower than that of both Costa Rican groups. In addition, both Visual Processing subtests are invalid for all groups compared since the item order of difficulty does not match the test item order, thus affecting the enforcement of the cut off rules and making these subtests invalid for these populations.Standardized assessments and intelligence trait are considered the results of mathematical and statistical expressions built on test developers' own cultural views and minds. They follow along the lines of the traditional reductionist assessment or scientific/medical models. As a result, it is concluded that bilingual populations will be at disadvantage because standardized assessment neither links assessment to familiar language, cultural relevant information, and experiences nor considers how the bilingual mind processes information.

The purpose of this study was to explore the construct validity of the Kaufman Assessment Battery for Children, Second Edition (KABC-II; Kaufman & Kaufman, 2004a) and the Woodcock-Johnson Tests of Cognitive Abilities, Third Edition (WJ-III COG; Woodcock, McGrew, & Mather, 2001) with a sample of 200 preschool children, ranging in age from 4 years, 0 months to 5 years, 1 1 months, and attending preschool and daycare programs in and around a Midwestern city. This study attempted to determine if the Cattell-Horn-Carroll (CHC) factor structure represented on these tests can be identified with young children. Individual confirmatory factor analyses were conducted separately with the KABC-II and WJ-III COG. Moreover, a joint confirmatory factor analysis was conducted using both the KABC-II and WJ-III COG. The results of the individual KABC-II factor analyses indicated a two-tiered Gf Gc model provided the best fit to the data, although the three-tiered CHC model also fit the data well. This suggests the underlying factor structure of the KABC-II is well represented by the CHC theory. The WJ-III COG was best represented by an alternative CHC model, in which the Gf factor and subtests had been removed, indicating not all CHC constructs represented on the WJ-III COG can be reliably identified among young children. The joint confirmatory factor analysis indicated the strongest measures of the shared CHC factors on the KABCII and WJ-III COG, which can help to guide cross-battery assessment with preschool children. Overall, the results confirmed multiple CHC abilities can be assessed with young children, implying clinicians should be using preschool tests that provide scores for several cognitive abilities. This study also revealed the constructs of the CHC theory may be represented somewhat differently on preschool tests due to developmental influences. Strong correlations were evident between unrelated tasks, primarily because the verbal and linguistic demands of many subtests caused them to load unexpectedly on the Gc factor. Suggestions for future research include conducting the same study using preschool children with suspected disabilities, as well as with older children, examining other instruments that include a Gf factor, and conducting exploratory factor analysis with subtests from the KABC-II and WJ-III COG that contain significant components of more than one ability. / Department of Educational Psychology

There is no abstract available for this dissertation. / Department of Educational Psychology

The purpose of this study was to add to the body of psychometric evidence underlying the Dean-Woodcock Sensory Motor Battery (DWSMB) and the theory of sensory motor functioning. Secondly, this study added to the body of literature concerning the role of both cortical and subcortical areas of the brain in motor functioning.The DWSMB is a new battery designed to meet the emerging trends in neuropsychology. It combines the qualitative functionality of the sensory and motor tests used by clinical neurologists with the quantitative, performance-driven sensory motor tests found in traditional neuropsychological assessment batteries. The DWSMB consists of eight tests of sensory functions, seven tests of cortical motor functions, and three tests of subcortical motor functions.A population sample of 441 participants were administered the DWSMB, 340 of which had no reported neurological or psychiatric history. These data were analyzed using an exploratory factor analysis to determine the number of constructs underlying the DWSMB. The study found three factors: a Complex Sensory Motor Factor, a Simple Sensory Factor, and a Subcortical Motor Factor. The three constructs found in this study provided empirical support for the underlying theory of the DWSMB, which will allow neuropsychologists to make inferences about the resulting scores. / Department of Educational Psychology

This study investigated the utility of the cognitive measures of the Dean-Woodcock Neuropsychological Assessment System (D-WNAS) in the differential diagnosis of Alzheimer dementia (AD) from depression. Past research has found an overlap of symptoms in the early stages of AD and those found in geriatric depression. In both instances, patients are likely to report memory loss, attention deficits, and mood disturbances. As a result of this similarity, differentially diagnosing one from another is a vexing problem for the clinical practitioner. Although a number of screening measures have been offered, none have proven to be clinically useful. Some have proposed this is the result of reliance upon use of single-factor measures. Indeed, many have proposed a multiple factor assessment model would be of more utility in diagnosing AD and depression. Considering the importance of an accurate diagnosis in treatment, this study utilized a multiple factor cognitive model offered by the Dean-Woodcock Neuropsychological Assessment System to differentiate AD from depression.Specifically, subtest scores of the Woodcock-Johnson III - Tests of Cognitive Ability (WJ-III; cognitive measure of the Dean-Woodcock Neuropsychological Assessment System) were compared. Participants (n = 172) fell into one of three groups (i.e. Depressed, Demented, or Normal) based on the diagnoses of a board certified neurologist and neuropsychologist. Results showed clinical groups performed more poorly than normal participants on tests of the WJ-III. In addition, AD participants differed significantly from depressed participants on the Visual Matching and Spatial Relations tests of the WJ-III. However, in all, the WJ-III demonstrated a classification hit rate of less than 70%. Although groups were found to differ in specific ways, the classification hit rate of the WJ-III suggested it could not differentially diagnose AD from depression alone. / Department of Educational Psychology

The overall purpose of this study was to investigate the nature of the relationship between a recently revised, multidimensional intelligence test (WJ III COG) and a short form of an older, well-established intelligence test (WISC-III) with intellectually gifted children. As such, this study examined the implications of using a theoretically and empirically sound choice (WJ III COG) as compared to a more practical alternative (i.e., WISC-III short form); it also explored the impact of different cut-off and eligibility criteria upon eligibility decisions. Participants were solicited from a group of 75 students who had been nominated for a gifted program at a small elementary school located on the urban fringe of a midsize city in the Midwest. Thirty-five students, ranging in age from 9 years, 2 months to 11 years, 1 month, participated in this study. The sample included 15 students who were admitted into the program and 20 students who were deemed ineligible. The WISC-III short form exhibited a positive relationship with the WJ III COG, as its FSIQ estimate correlated significantly with both the WJ III COG GIA-Std and BIA scores, accounting for approximately 33% and 35% of the variance, respectively. The eligible group performed significantly higher on the WISC-III short form than the WJ III COG, whereas the ineligible group performed consistently across all global measures of intelligence. The eligibility of 46% of the sample varied as a result of the test and restrictiveness of the cut-off criteria. More students were identified as intellectually gifted when flexible, rather than strict, cut-off criteria were used to make eligibility decisions. Moreover, the eligibility of approximately 63% of the participants varied as a result of the test and whether eligibility criteria involved general and specific intellectual abilities or solely general intellectual ability. More students were deemed eligible when general and specific intellectual abilities were considered as compared to decisions based only on general intellectual ability. / Department of Educational Psychology

Based on phenomenology, traditional methods of diagnoses of attention deficit/hyperactivity disorder-combined type (ADHD/C) and reading disorder (RD) are neither precise, nor do they provide explicit information relevant to intervention. Consequently, current researchers have called for diagnostic techniques based on etiological rather than traditional symptom-based markers. The purpose of this study was to examine whether or not WJ III cognitive profiles of individual students provided meaningful diagnostic evidence of ADHD/C and/or RD congruent with prominent theories and group scores from quantitative studies. Six holistic student cases were examined. Two were prequalified with ADHD/C, two with RD, and two with ADHD/C+RD using traditional symptom-based diagnosis. Data were drawn from archived psychoeducational evaluation case files including background information, psychosocial evaluations, and WJ III cognitive profiles. Contextual mediators such as testing room conditions, behavioral observations, and developmental histories were examined that might influence the interpretation of cognitive profiles within the school setting.Among the four students prequalified with RD, three students displayed the requisite cognitive profile of weaknesses on clusters of Phonemic Awareness-3 and/or Cognitive Fluency. A review of distinctive contexts in the fourth student's case as well as the absence of the expected RD cognitive profile supported the determination that his reading problems were secondary to ADHD/C. These findings produced theoretical as well as literal replications of the double-deficit theory of RD. Results were less clear among the four students prequalified with ADHD/C due to varying performances on tests of Broad Attention and Executive Processes--cognitive factors documented by the behavioral inhibition theory of ADHD/C. As expected, students prequalified with ADHD/C+RD displayed a wider range of deficits, presumably due to the additive effect of having two disorders. The mediating influence of idiosyncratic contexts underscored the importance of professional judgment in cognitive profile interpretation.Although it is sometimes difficult to distinguish between academic performance deficits associated with ADHD/C and skills deficits associated with RD, it was shown that cognitive profiles in concert with a comprehensive psychoeducational evaluation can, in some cases, provide etiological evidence for differential diagnosis and a guide for intervention. More practice-based research within ecologically valid environments is recommended. / Department of Educational Psychology

A considerable about of research has concentrated on studying the performance of high achieving children on measures of intellectual functioning. Findings have indicated high achieving children display differences in performance patterns as well as in the cognitive constructs measured when compared to their average peers. The conceptualization of intelligence has evolved over time and contemporary theories of intelligence have described cognitive ability as consisting of multiple constructs which are often interrelated. Currently. one of the most comprehensive and empirically supported theories of intelligence is the Cattell-Horn-Carroll (CHC) theory (Cattell, 1941; Horn, 1968: Carroll, 1993). The multidimensional and hierarchical CHC theory has served as the foundation for the development and recent revisions of cognitive ability measures such as the Woodcock-Johnson Tests of Cognitive Ability– Third Edition (WJ-III COG; McGrew & Woodcock 2001) and the Stanford-Binet Intelligence Scales – Fifth Edition (SBS: Raid, 2003b). The purpose of this study was to explore the construct validity of the WJ-III COG and SB5 with a sample of high achieving children. Individual confirmatory factor analyses were conducted using the WJ-III COG and SB5. Additionally. a joint confirmatory factor analysis was conducted using both the WJ-III COG and SB5. The results indicated an alternative six-factor WJ-IlI COG and four-factor SB5 models provided the best fit to the data of a high achieving sample, supporting previous research suggesting high achieving children display differences in cognitive constructs when compared with their average counterparts. The joint-confirmatory factor analysis indicated the best measures for the CHC factors measured by both the WJ-III COG and SB5 to help guide cross-battery assessments with high functioning children. Clinical applications of the findings are discussed. / Department of Educational Psychology

The present study investigated the relationship between sensory/motor skills and cognitive abilities in psychiatric and neurologically impaired patients to determine how sensory/motor skills are associated with cognitive abilities. Previous research has demonstrated a significant relationship between performance on sensory/motor tasks and cognition but has failed to examine how well sensory/motor skills can predict specific cognitive performance. Because brain functioning is hierarchical with simpler processes being foundational to the development of more complex functions, it is likely sensory/motor skills can aid in the prediction of specific cognitive abilities. If this is true, then investigation of the relationship between sensory/motor performance and cognition should provide insight into the role of sensory/motor skills in the Dean-Woodcock Cognitive Neuropsychology Model.This study examined the relationship between scores on the Woodcock-Johnson Tests of Cognitive Ability - Revised (WJ-R COG) and scores on the Dean-Woodcock Sensory and Motor Battery (D-WSMB). Participants included 458 patients referred for neuropsychological consultation with neurological and/or psychiatric diagnoses. Results indicated a significant correlation among cognitive scores and sensory/motor scores. Moreover, factor analysis revealed 7 overall factors that account for approximately 65% of the variance. These factors were identified as being thinking ability and processing speed, subcortical functioning, verbal working memory, peripheral processes, tactile kinesthetic thinking (Gtk), visual processing, and simple sensory/motor.Integration of sensory/motor factors into the Dean-Woodcock Cognitive Neuropsychology Model revealed the significant role sensory/motor performance plays in predicting higher-order cognitive abilities. From the analysis it appeared that certain sensory/motor functions were significant contributors to the prediction of specific cognitive abilities. That is, subcortical functioning aided in the prediction of all measured areas of cognition; visual processing contributed to visual-spatial thinking, novel reasoning, and crystallized knowledge; tactile-kinesthetic thinking helped predict visual-spatial thinking, auditory processing, and crystallized knowledge; and simple sensory/motor functioning aided in the explanation of long-term storage-retrieval.These results offer a beginning point for further investigation into the relationship between specific sensory/motor skills and cognitive abilities. Research in this area can provide further insight into the functional organization of the brain and offer application to cognitive outcome in rehabilitation as well as preschool screening. / Department of Educational Psychology